CN102232881A - Lumbar interbody fusion device - Google Patents

Lumbar interbody fusion device Download PDF

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Publication number
CN102232881A
CN102232881A CN2010106077193A CN201010607719A CN102232881A CN 102232881 A CN102232881 A CN 102232881A CN 2010106077193 A CN2010106077193 A CN 2010106077193A CN 201010607719 A CN201010607719 A CN 201010607719A CN 102232881 A CN102232881 A CN 102232881A
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CN
China
Prior art keywords
shaped plate
interbody fusion
holes
vertebral body
fusion devices
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Granted
Application number
CN2010106077193A
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Chinese (zh)
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CN102232881B (en
Inventor
丁真奇
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175th Hospital of PLA
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175th Hospital of PLA
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Priority to CN2010106077193A priority Critical patent/CN102232881B/en
Publication of CN102232881A publication Critical patent/CN102232881A/en
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Publication of CN102232881B publication Critical patent/CN102232881B/en
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/44Joints for the spine, e.g. vertebrae, spinal discs
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof

Abstract

The invention discloses a lumbar interbody fusion device and relates to an orthopedic operation implant. The device has a hollow titanium alloy skeleton for holding bones, wherein the skeleton is shaped like a U-shaped plate; the rear vertical wall of the U-shaped plate does not have any hole, but the front vertical wall of the U-shaped plate has a plurality of holes; the upper and lower two sides of the bottom of the U-shaped plate both has a stepped inclined hole; the big ends of the two inclined holes are both positioned on the bottom faces of the bottoms, and the small ends of the two inclined holes are both positioned on end faces corresponding to the bottoms; and bolts are inserted into the two inclined holes in the U-shaped plate respectively. When the device with small volume is used, little lumbar body is cut off, fusion is more reliable, bleeding of the patient is relieved, and the blood supply to the lumbar body can be maintained. Broken bones are prevented from entering the canalis spinalis, so secondary neurothlipsis is avoided. Collapse is avoided. And a doctor can observe the growth of callus and lumbar interbody fusion conveniently.

Description

A kind of interbody fusion devices
Technical field
The present invention relates to a kind of bone surgery implants.
Background technology
For repairing the vertebral body of injured damage, foreign medical science circle has been invented artificial vertebral body, for example titanium cage (TMC).The titanium cage is a kind of hollow skeleton made from titanium alloy, surrounds cylinder by the titanium alloy sheet that has a plurality of mesh, and inside is furnished with circular supporter.During use, the vertebral body work of injured damage need be cut entirely, the vertebral body of injured damage is cut a hole into the ghost shape that the side is opened wide; The titanium cage that will fill broken bone is again put into wherein.Withstand lower surface of a last joint vertebral body and the upper surface of next joint vertebral body respectively by the lobe of titanium cage two ends point-like.Along with the growth of the vertebral body of injured damage, the broken bone in the final titanium cage is with two joint vertebral bodys growths are as a whole up and down; And can passing the mesh of titanium cage, little blood vessel follows bone growth.Thereby reach the therapeutical effect of vertebral fusion.
But the titanium cage also has following shortcoming: 1, and determined it columniform bulky by titanium cage type shape, for it being implanted the vertebral body of injured damage, do inferior cutting full when handling, patient's bleeding is many on the one hand, can destroy the blood supply of vertebral body on the other hand.2, the titanium cage only depends on the point-like lobe at two ends to withstand a joint vertebral body and next joint vertebral body, easily produces collapse phenomenon.3, can not bone grafting around the titanium cage, and the titanium cage do not have the baffle effect of blocking canalis spinalis, and the plant bone mass in the titanium cage may enter the canalis spinalis pressuring nerve once more.4, the titanium cage encases newborn bone; When carrying out imaging examination, the titanium cage can stop ray, and the doctor is difficult for observing the growing state of callus.
Summary of the invention
The present invention aims to provide a kind of interbody fusion devices, can avoid producing the shortcoming of above-mentioned titanium cage.
Technical scheme of the present invention is: a kind of interbody fusion devices, have the hollow titanium alloy framework that holds broken bone, and this skeleton is a U-shaped plate, the not perforate of back wall of this U-shaped plate and preceding wall has a plurality of holes; The upper and lower both sides of this U-shaped plate bottom respectively have a stair-stepping inclined hole, and the big end of two inclined holes all is positioned on the bottom surface of bottom, and the small end of two inclined holes lays respectively on the corresponding end face in bottom; Wear screw respectively in two inclined holes of this U-shaped plate.
The tail medicated cap periphery of described two screws is an arc surface, and the big end of each inclined hole of described U-shaped plate and small end intersection are arc section, and this arc surface and this arc section are complementary.The going into to follow closely angle what has change of two screws no matter, the arc surface of two screw tail medicated caps can closely contact with the arc section of the corresponding inclined hole of U-shaped plate.Thereby the latching force that can keep the right U-shaped plate of two screws.
The back wall outer surface of described U-shaped plate is established the slope along free end, and preceding wall outer surface is established the slope along free end.Provide the guide part of being convenient to the insertion of U-shaped plate for placing the U-shaped plate in the operation.
The upper/lower terminal of the back wall of described U-shaped plate, preceding wall and bottom is split into tooth bar respectively.Tooth bar can increase the frictional force between U-shaped plate and a last joint vertebral body and next the joint vertebral body, improves the stability of U-shaped plate.
The upper/lower terminal of described U-shaped plate is parallel or not parallel.The design that the upper/lower terminal of U-shaped plate is parallel, the soleplate of the thoracic vertebra vertebral body of more fitting; The sloping design of the upper/lower terminal of U-shaped plate, the soleplate of the lumbar vertebra of more fitting; They can prevent that local pressure from excessively causing subsiding, fracture of lumbar vertebral body etc. up and down.
Interbody fusion devices of the present invention (also can be referred to as U type artificial vertebral body), the thickness of titanium alloy being made with two screws are that the U-shaped plate of 0.6cm is locked in a last joint vertebral body that hinders vertebra and saves between the vertebral body with next.But U-shaped intralaminar part and the place ahead be bone grafting all, and the bone grafting amount is big, is easy to form biological connection.The volume of U-shaped plate is little, the vertebral body of injured damage need not to do the inferior processing of cutting entirely, only need excise back 1/3rd of vertebral body can lay, front pillar and part center pillar have been kept, the excision vertebral body is few, keeps to hinder the most of sclerotin of vertebra, when reducing patient's bleeding, keep the blood confession of vertebral body, be beneficial to the bone fusion of hindering the vertebra front middle part.The not perforate of back wall of U-shaped plate, the effect that can play gate stops the broken bone piece of bone grafting to enter canalis spinalis, thereby causes the nerve compression of secondary.Wall has a plurality of holes before the U-shaped plate, is easy to form biological connection, and little blood vessel can pass these holes and follow bone growth.This U-shaped plate wears screw respectively in the inclined hole of the upper and lower both sides of bottom, screw is locked in upper vertebral body and the next terminal plate of vertebral body, can reduce implants and occur subsiding.During imaging examination, hinder the situation of 2/3 healing before the vertebra, can intuitively assess the situation of vertebral fusion by observation.
Description of drawings
Fig. 1 is the perspective view of an embodiment of interbody fusion devices of the present invention.
Fig. 2 is the perspective view of U-shaped plate among Fig. 1 embodiment.
The structural representation that Fig. 3 looks from the bottom for U-shaped plate among Fig. 1 embodiment.
Fig. 4 is the cross-sectional view of U-shaped plate among Fig. 1 embodiment.
Fig. 5 is the perspective view of screw among Fig. 1 embodiment.
Fig. 6 is the user mode sketch map of Fig. 1 embodiment.
Fig. 7 is the perspective view of second embodiment of interbody fusion devices of the present invention.
Fig. 8 is the perspective view of U-shaped plate among Fig. 7 embodiment.
The structural representation that Fig. 9 looks from the bottom for U-shaped plate among Fig. 7 embodiment.
Figure 10 is the cross-sectional view of U-shaped plate among Fig. 7 embodiment.
Figure 11 is the user mode sketch map of Fig. 7 embodiment.
The specific embodiment
One, embodiment one
One of interbody fusion devices of the present invention is optimized embodiment, is used to repair lumbar vertebra.The stereochemical structure of present embodiment, as shown in Figure 1, it is made up of a U-shaped plate 1 and two screws 2.
U-shaped plate 1 is to make the hollow skeleton that thickness is 0.6cm with titanium alloy, and its structure is please referring to Fig. 2.The back wall 11 and the preceding wall 12 of U-shaped plate 1 are fused by bottom 14.The upper/lower terminal of U-shaped plate 1 is not parallel, and the angle that constitutes the slope is arranged.The upper end of the back wall 11 of U-shaped plate 1, preceding wall 12 and bottom 14 is split into tooth bar 13.The lower end of the back wall 11 of U-shaped plate 1, preceding wall 12 and bottom 14 is split into tooth bar 15.The back wall 11 of U-shaped plate 1, preceding wall 12 and bottom 14 cross inside groove 16.
Leave slope 111 at U-shaped plate 1 back wall 11 outer surfaces one along free end.Back wall 11 has a rearward recess 112 that extends to seamed edge near the middle part of bottom 14.
Please see Fig. 1 back: wall 12 outer surfaces are left slope 121 one along free end before U-shaped plate 1.Preceding wall 12 has a forward recess 122 that extends to seamed edge near the middle part of bottoms 14.Have a plurality of small sircle holes 123 evenly distributedly on the preceding wall 12.
Slope 111 on the U-shaped plate 1 back wall 11 and the slope 121 on the preceding wall 12 provide a guide part for placing U-shaped plate 1 in the operation.Rearward recess 112 on the U-shaped plate 1 back wall 11 and the forward recess 122 on the preceding wall 12 provide a clamping part for using this U-shaped plate 1 of tweezers clamping in the operation.
Please referring to Fig. 3: the upper and lower both sides of bottom 14 respectively have a stair-stepping inclined hole 141; Angle between the normal of the axis of each inclined hole 141 and bottom 14 is 50 °.The big end of two inclined holes 141 all is positioned on the bottom surface of bottom 14, and the small end of two inclined holes 141 lays respectively on the 14 corresponding end faces of bottom.The big end and the small end intersection of each inclined hole 141 are treated to arc section 1411.14 centre, bottom has a screwed hole 142, so that an auxiliary hand-holding rod is installed in operation, and the position that the vertebral body that this U-shaped plate 1 is put into injured damage has been dug.
Screw 2 usefulness titanium alloys are made, and its structure is please referring to Fig. 5.Nail body 21 front ends of screw 2 are established taper threaded portion 22, and this taper threaded portion 22 can screw in the bone easily, and the good anti-performance that withdraws from is arranged; Tail medicated cap 23 is established in the rear end of nail body 21.Please, have hexagonal jack 231 on the end face of tail medicated cap 23, to adapt to six safe in operation side's screwdrivers referring to Fig. 1.The perimeter treatment of tail medicated cap 23 becomes arc surface 232, and this arc surface 232 is complementary with the arc section 1411 of U-shaped plate 1 bottom 14 two ends inclined holes 141.
The user mode of this interbody fusion devices embodiment is please referring to Fig. 6: in the operation, dig the cannelure that can hold U-shaped plate 1 at lumbar vertebra 3 trailing edges of injured damage, can keep the front pillar 31 and the part center pillar of injured damage lumbar vertebra during fluting.Broken bone is put into the inside groove 16 of U-shaped plate 1, observe the filling situation of broken bone by each small sircle hole 123 on the preceding wall 12 simultaneously, and adjust it, make broken bone be full of the inside groove 16 of U-shaped plate 1.With rearward recess 112 on the tweezers clamping U-shaped plate 1 back wall 11 and the forward recess 122 on the preceding wall 12, make the free end of U-shaped plate 1 back wall 11 and the cannelure of free end on the lumbar vertebra 3 of injured damage of preceding wall 12, the U-shaped plate 1 that fills broken bone is put into the cannelure that the lumbar vertebra 3 of injured damage has been dug.The preceding wall 12 of U-shaped plate 1 is towards front pillar 31, and the implantable bone in the place ahead of preceding wall 12 is so that form biological connection.The back wall 11 of U-shaped plate 1 is towards canalis spinalis, and back wall 11 can prevent that the broken bone of hindering vertebra and bone grafting from entering canalis spinalis.The tooth bar 13,15 of U-shaped plate 1 upper/lower terminal withstands the lower surface of a joint lumbar vertebra 4 and the upper surface of next joint lumbar vertebra 5 respectively.Pass the inclined hole 141 of upper and lower both sides, U-shaped plate 1 bottom correspondence respectively with two screws 2, and making two screws 2 protruding from the upper/lower terminal of U-shaped plate 1 respectively, the taper threaded portion 22 of two screws 2 is locked in the bottom of a joint lumbar vertebra 4 and the top of next joint lumbar vertebra 5 respectively; Arc surface 232 until two screw 2 tail medicated caps 23 closely contacts with the arc section 1411 of U-shaped plate 1 corresponding inclined hole 141.Two screws 2 are locked in U-shaped plate 1 between a last joint lumbar vertebra 4 and next the joint lumbar vertebra 5.
Two, embodiment two
Second of interbody fusion devices of the present invention optimized embodiment, is used to repair thoracic vertebra.The stereochemical structure of present embodiment, as shown in Figure 7, it is made up of a U-shaped plate 6 and two screws 2.The structure of screw 2 is identical with the screw of last embodiment 2, repeats no more.
U-shaped plate 6 is to be the hollow skeleton of 0.6cm with the thickness that titanium alloy is made, and its structure is please referring to Fig. 8 and Tu.The back wall 61 and the preceding wall 62 of U-shaped plate 6 are fused by bottom 64.The upper/lower terminal of U-shaped plate 6 is parallel.The upper/lower terminal of this U-shaped plate 6 does not have the design on slope, the soleplate of the thoracic vertebra vertebral body of more fitting.The upper/lower terminal of the back wall 61 of U-shaped plate 6, preceding wall 62 and bottom 64 is split into tooth bar 63 respectively.The back wall 61 of U-shaped plate 6, preceding wall 62 and bottom 64 cross inside groove 65.
Wall 61 outer surfaces are left slope 611 one along free end in the back.Back wall 61 has a rearward recess 612 that extends to seamed edge near the middle part of bottom 64.
Pro-wall 62 outer surfaces are left slope 621 one along free end.Preceding wall 62 has a forward recess 622 that extends to seamed edge near the middle part of bottoms 64.Have four slotted holes 623 evenly distributedly on the preceding wall 62.
Slope 611 on the U-shaped plate 6 back walls 61 and the slope 621 on the preceding wall 62 provide a guide part for placing U-shaped plate 6 in the operation.Rearward recess 612 on the U-shaped plate 6 back walls 61 and the forward recess 622 on the preceding wall 62 provide a clamping part for using this U-shaped plate 6 of tweezers clamping in the operation.
Please referring to Figure 10: the upper and lower both sides of U-shaped plate 6 bottoms 64 respectively have a stair-stepping inclined hole 641; Angle between the normal of the axis of each inclined hole 641 and bottom 64 is 50 °.The big end of two inclined holes 641 all is positioned on the bottom surface of bottom 64, and the small end of two inclined holes 641 lays respectively on the 64 corresponding end faces of bottom.The big end and the small end intersection of each inclined hole 641 are treated to arc section 6411.The arc section 6411 of U-shaped plate 6 bottoms 64 two ends inclined holes 641 is complementary with the periphery arc surface 232 of screw 2 tail medicated caps 23.The centre of U-shaped plate 6 bottoms 64 has a screwed hole 642, so that an auxiliary hand-holding rod is installed in operation, and utilizes this hand-holding rod that this U-shaped plate 6 is put into the position that the thoracic vertebra vertebral body of injured damage has been dug.
The user mode of this interbody fusion devices embodiment is please referring to Figure 11: in the operation, dig a cannelure that holds U-shaped plate 6 at thoracic vertebra vertebral body 7 trailing edges of injured damage, can keep front pillar 71 and the part center pillar of injured damage thoracic vertebra vertebral body during fluting.Broken bone is put into the inside groove 65 of U-shaped plate 6, observe the filling situation of broken bone by slotted hole on the preceding wall 62 623 simultaneously, and adjust it.With rearward recess 612 on the tweezers clamping U-shaped plate 6 back walls 61 and the forward recess 622 on the preceding wall 62, make the free end of U-shaped plate 6 back walls 61 and the cannelure of free end on the thoracic vertebra vertebral body 7 of injured damage of preceding wall 62, the U-shaped plate 6 that fills broken bone is put into the cannelure that the thoracic vertebra vertebral body 7 of injured damage has been dug.The preceding wall 62 of U-shaped plate 6 is towards front pillar 71, and the implantable bone in the place ahead of preceding wall 62 is so that form biological connection.The back wall 61 of U-shaped plate 6 is towards canalis spinalis, and back wall 61 can prevent that the broken bone of hindering vertebra and bone grafting from entering the thoracic vertebra canalis spinalis.The tooth bar 63 of U-shaped plate 6 upper/lower terminals withstands lower surface of a joint thoracic vertebra vertebral body 8 and the upper surface of next joint thoracic vertebra vertebral body 9 respectively.Two screws 2 pass the inclined hole 641 of U-shaped plate 6 bottom correspondences respectively, and protruding from the upper/lower terminal of U-shaped plate 6, and the taper threaded portion 22 of two screws 2 is locked in bottom of a joint thoracic vertebra vertebral body 8 and the top of next joint thoracic vertebra vertebral body 9 respectively; The arc surface 232 of two screw 2 tail medicated caps 23 closely contacts with the arc section 6411 of U-shaped plate 6 corresponding inclined holes 641.Two screws 2 are locked in U-shaped plate 6 between a last joint thoracic vertebra vertebral body 8 and next the joint thoracic vertebra vertebral body 9.
The above only is preferred embodiment of the present invention, does not limit scope of the invention process with this, and the equivalence of doing according to technical scheme of the present invention and description changes and modification, all should belong to the scope that the present invention is contained.

Claims (5)

1. an interbody fusion devices has the hollow titanium alloy framework that holds broken bone, it is characterized in that: this skeleton is a U-shaped plate, the not perforate of back wall of this U-shaped plate and preceding wall has a plurality of holes; The upper and lower both sides of this U-shaped plate bottom respectively have a stair-stepping inclined hole, and the big end of two inclined holes all is positioned on the bottom surface of bottom, and the small end of two inclined holes lays respectively on the corresponding end face in bottom; Wear screw respectively in two inclined holes of this U-shaped plate.
2. a kind of interbody fusion devices according to claim 1 is characterized in that: the tail medicated cap periphery of described two screws is an arc surface, and the big end of each inclined hole of described U-shaped plate and small end intersection are arc section, and this arc surface and this arc section are complementary.
3. a kind of interbody fusion devices according to claim 1 and 2 is characterized in that: the back wall outer surface of described U-shaped plate is established the slope along free end, and preceding wall outer surface is established the slope along free end.
4. a kind of interbody fusion devices according to claim 1 and 2 is characterized in that: the upper/lower terminal of the back wall of described U-shaped plate, preceding wall and bottom is split into tooth bar respectively.
5. a kind of interbody fusion devices according to claim 1 and 2 is characterized in that: the upper/lower terminal of described U-shaped plate is parallel or not parallel.
CN2010106077193A 2010-04-23 2010-12-27 Lumbar interbody fusion device Expired - Fee Related CN102232881B (en)

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CN201020169170 2010-04-23
CN2010106077193A CN102232881B (en) 2010-04-23 2010-12-27 Lumbar interbody fusion device

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CN109925101A (en) * 2019-04-17 2019-06-25 嘉思特华剑医疗器材(天津)有限公司 A kind of bion knee joint mechanical pressurization tibial plateau
CN116196155A (en) * 2023-02-23 2023-06-02 重庆富沃思医疗器械有限公司 Lumbar interbody fusion cage

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CN102232881B (en) * 2010-04-23 2013-01-23 中国人民解放军第一七五医院 Lumbar interbody fusion device
CN102319129B (en) * 2011-10-24 2015-05-20 北京爱康宜诚医疗器材股份有限公司 Fusion prosthesis
CN103239305A (en) * 2012-02-10 2013-08-14 北京爱康宜诚医疗器材股份有限公司 Self-stabilization artificial vertebral body
CN111839835B (en) * 2020-08-31 2022-04-12 四川大学华西医院 Intervertebral fusion fixer for lateral anterior approach vertebral body reconstruction

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WO2005058209A2 (en) * 2003-12-11 2005-06-30 Sdgi Holdings, Inc. Expandable intervertebral implant
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CN109925101A (en) * 2019-04-17 2019-06-25 嘉思特华剑医疗器材(天津)有限公司 A kind of bion knee joint mechanical pressurization tibial plateau
CN116196155A (en) * 2023-02-23 2023-06-02 重庆富沃思医疗器械有限公司 Lumbar interbody fusion cage
CN116196155B (en) * 2023-02-23 2024-01-26 重庆富沃思医疗器械有限公司 Lumbar interbody fusion cage

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